We recently received a piece of equipment, which is controlled with a MicroLogix 1500 w/ expandable I/O modules. On one of the output modules there are several solenoid valves that are attached to it. The rating for each solenoid valve is 1.2 amp. The rating for each output is 2 amps. There is no surge suppression on any of the outputs and no fuse protection. We are experiencing problems with the outputs failing. Since the ratings for the output and field devices are so close coupled with no means of protection should I add low current relays to control these devices with the output from the PLC? I would also still add the surge suppression and fuse protection.
Thanks
rmonroe
Thanks
rmonroe